Mold foe casting teeth foe diamond saws



(No Model.)

RFGERSTER. MOLD POR CASTING TEETH POR DIAMOND SAWS. 10.340,204. PatentedApr. 20, 1886.

/mdlice UNITED STATES ATENT lirica.

EMANUEL FOERSTER, OF NEW' YORK, N. Y.

MOLD FOR CASTING TEETH FOR DIAMONDSAWS.

SPECIFICATION forming part of Letters Patent No 340,204, dated April 20,18.86.

Application tiled August 22, 1885. Serial No. 175,055.

To LZZ whom i may concern:

Be it known that I, EMANUEL FoERsTER, of the city, county, and State ofNew York, have invented certain new and useful Improvements in Molds forCasting Teeth forDiamond-Saws, of' which the following is aspecification.v

This invention has reference to an improved mold for casting teeth fordiamond-saws, the mold being specially designed to adjust and hold thediamonds, so as to secure the exact position of the same for casting themetal tooth around the same.

In the accompanying drawings, Figure 1 represents a side elevation of myimproved mold for casting diamondsaw-teeth. Fig. 2 isatop view; Fig. 3,an end elevation; Fig. 4, a vertical transverse section on line .fr x,Fig. 2; Fig. 5, a horizontal section of the same on line yy, Fig. l; andFig. 6 are end views of saw-teeth, showing dilierent ways of setting thediamonds.

Similar letters of reference indicate corresponding parts.

Referring to the drawings, A A represent the side walls of my improvedmold for casting the teeth of diamond-saws, which are respect? ivelyprovided with a gate, a, for the molten metal, and a vent-hole, a', forthe escape of the air. To the side walls, A A, is attached, by screws bb, a bottom plate, B. The side walls, A A, are provided with recesses attheir middle parts, where the body of the saw-tooth is to be cast.Sideplates, d d, extend longitudinally of the mold outside the sidewalls, A A, and serve to cover the central apertures or recessestherein. These side plates are held in place by bolts CC', which passthrough them and through the side walls, A A. These side plates, d d,may, if desired, be cast integral with the walls A A. In said recessesare arranged a number of laterally-movable cheeks, e e, which areadjusted from the outside by screws e', that pass through threaded holesin the plates d and engage by their inner pin-shaped ends socket-- holesof the cheeks e. The faces of the cheeks e are either smooth or providedalternately with Vforward-projecting pins e2. The smooth cheeks e e areused for setting -diamonds of larger size, which project at both sidesof the sawtooth,while the cheeks with pins e2 serveA for settingdiamonds of smaller size.

For setting the diamonds into the mold pre- (No model.)

paratory to casting the body ofthe tooth around the same, the bottomplate is removed and the diamonds clamped between two opposite cheeks ee, or between one of the cheeks e and the pin e2 of the opposite cheek,by screwing up the set-scrcws e e. According to the size ofthe diamonds,they are seteitherinto line or in such a position that they projectalternately at opposite sides ofthe body of the tooth, as shown in Fig.6. The bottom plate, B, is then replaced and the diamonds set thereby inline. The metal is then cast in the usual manner around the diamonds,andthe tooth afterward inserted into the saw-blade.

The top of the mold is covered by a plate, D, which lies between theside walls, A A, in a plane above the recessed portionthereof. The moldis closed atits en ds by end pieces,E,which are fitted between the wallsA A and extend from the bottom B to the top plate, D. These t end piecesare preferably V-shaped in crosssection, whereby grooves are formed inthe sawtooth for the insertion thereof in Vthe blade of the saw; or theend pieces may be reversed, so as to taper the edge of thesaw-tooth andadapt it to tit the groove in the saw-blade.

By casting the body around the diamonds and alternating the position ofthe diamonds, diamonds of very small size can beadvantageouslyused,whereby the expense of diamondsaws is considerablydiminished.

The arrangement of the cheeks with independent set-screws whichbearonthe diamonds facilitates their accurate adjustment withoutshifting them axially, which is the case in molds in which theset-screws are applied direetly to the diamonds. The metal body is castnearly iiush with the diamonds, the points ofwhich project slightlybeyond the metal.

As'the diamonds become worn, they are re set again from time to time bycasting a new body of metal around them,whereby they can be used untilentirely worn out.

Any shape of diamond can be used, as the cheeks bind readily thereon andhold them accurately and reliably in position.

Having thus described my invention, I claim as new and desire to secureby LettersPatentl. The combination, in a mold for casting teeth fordiamond-saws, of recessed side walls, side plates, a bottom plate, andlaterally-ad- IOO jnstahle eheeks within the recesses of the side walls,said cheeks having their i nner faces tlnsh with the inner faces oftheside walls hen in operative position, whereby they constitute partsofthe moldsurl'aoein line with said walls,

.and set-screws threaded into the side plates and engaging said cheeks,substantially as described.

2. The combination of a niold'body having recessed side walls, sideplates, and a bottoni plate, of laterallyadjnslable cheeks providedalternately with projecting pins and set-screws threaded into the sideplates and engaging sockets of said cheeks, substantially as set forth.

